计算机的存储器可以分为两部分.所有计算机都有的部分是主存储器.第二部分称为文件存储器或辅助存储器,在需要的时候,常用以存储大量的信息.主存储器是由半导体器件组成的,其运行速度比文件存储器快的多
The memory of a computer
The memory of a computer can be divided into two parts. All the computers are some part is main memory. The second part is called a file memory or secondary storage, when needed, used to store huge amounts of
main memory is composed of semiconductor devices, the operating speed is much faster than the file storage. .
几百年前,人们发现存在两种电荷.这两种电荷被称为正电荷和负电荷正电荷用(+)表示,负电荷用(-)表示.这些符号今天仍然通用.人们还发现,同种电荷-同正或同负-互相排斥,而异种电荷-一正一负则相吸引
Hundreds of years ago, it was found that there are two kinds of charge. The two charge is called a positive charge and negative charge. With a positive charge (+), said the negative (-). These symbols are still common today. It also found that the same - same positive or negative electric charge repel each other, while unlike charges - one is a negative - attract each other.. Hundreds of years ago, it was found that there are two kinds of charge. The two charge is called with a positive charge and negative charge (+), said the negative (-). These symbols are still common today. It also found that the same - same positive or negative electric charge repel each other, and unlike charges attract - one is a negative phase
一家技术研究机构指出，全球范围个人电脑销售持续下降，而平板电脑(table)正在取代个人电脑成为许多人的主要电脑装置。2013年第二季度的.全球个人电脑出货量与去年同比下降11%。全球消费者正专买价格较为便宜的平板电脑。在新兴市场，价格便宜的平板电脑已经成为许多人的首选电脑装置。苹果公司2010年推出ipad之后，平板电脑开始受到人们的喜爱。此后，各制造商纷纷推出价格更低的平板电脑，激烈的竞争使其价格一路下跌。
